Correct installation method of pump suction pipeline
The correct installation method of the suction and discharge pipelines of the pump is essential for the efficient operation and long-term use of the pump. The following is a comprehensive summary based on multiple sources:
1. Installation method of suction pipeline
Pipeline support:
All pipelines connected to the pump should have independent and firm supports to reduce pipeline vibration and prevent the weight of the pipeline from pressing on the pump.
During installation, the weight of the pipeline should be avoided from acting directly on the pump body to avoid affecting the performance and life of the pump.
Pipeline length and elbows:
The suction pipeline should be short and the elbows should be reduced to reduce fluid resistance and the possibility of gas accumulation.
When elbows must be set, ensure that the elbows are smooth to reduce fluid power losses.
Pipe diameter and reducer:
The diameter of the suction and discharge pipelines should not be less than the inlet and outlet diameters of the pump to ensure smooth flow of the fluid.
When a reducer is used, the length of the reducer should not be less than 5-7 times the difference between the large and small pipe diameters to reduce fluid disturbance and energy loss.
Gas removal:
There should be no place for gas to accumulate in the suction pipeline. When the pump is installed above the suction liquid level, no part of the suction pipeline should be higher than the pump inlet.
The horizontal straight pipe section should have an inclination (the pump inlet is high), and should not be less than 5/1000-20/1000 to ensure that the gas can be discharged smoothly.
Special device:
When the pump is installed above the suction liquid level and the inlet diameter is less than 350mm, a bottom valve should be installed; when the inlet diameter is greater than or equal to 350mm, a vacuum water diversion device should be installed.
The inlet pipeline should be equipped with a filter device or a dirt intercepting device to prevent impurities from entering the pump and causing blockage.
Other precautions:
The depth of the suction pipe mouth immersed under the water surface should not be less than 1.5-2 times the inlet diameter, and should not be less than 500mm.
The distance between the suction pipe mouth and the pool bottom and pool wall should also meet certain requirements to avoid the inhalation of impurities and the generation of vortexes.
